My C-38s have the standard brownish-red-with gold threading and I'm looking into other options.
I've seen some JBLs with black fish fabric and a gold abstract drizzle all over. I'm having...
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My C-38s have the standard brownish-red-with gold threading and I'm looking into other options.
I've seen some JBLs with black fish fabric and a gold abstract drizzle all over. I'm having...
That was my leaning as well. I'll see if I can find anything about phase plug differences.
Does anyone know what model these are?
I'm thinking 2445s because of the diaphragm.
They came out of an organ installation but no tags or stamps.
Hey guys -
I've done a bit of searching but have not been successful.
Does anyone have a pdf of the JBL crossover (n1200 & many others) cutout template?
thanks!
okay good to know!
This is what I will be attempting.
I've ordered some Jantzens, L-Pads and Dayton Resistors!
thank you all thus far.
Thanks for your help speakerdave and Wagner.
I definitely realize the 130a would shine in a different cabinet - larger and/or horn loaded.
My intent is to optimize the cabinet so the 130a can...
To achieve 20 square inches, I need a 5" circle or 2"x10" rectangle, correct?
Alrighty, been doing some reading!
From this page:
http://www.lansingheritage.org/images/jbl/plans/1960s-manual/page11.jpg
it says I should have a 20 Square Inch port with a 5" tunnel.
If...
Thank you guys for all the insight so far!
another question:
Does anyone know what the proper vent size, port size, and/or port tube length for a C-38 cabinet with a 130a?
In this picture...
Thanks for the response Thomas!
I am asking for both types, yes. Really I'm just trying to find out what I should do if I mount a 2405 in the cabinet (which covers up the only vent in the cabinet)
I've been looking for C34 and C35 cabinets. no luck yet - I've always loved the C34 cabinets. Tubes are on the list as well - I just wish I hadn't sold my 2A3 SET a few years ago. It just didn't play...
no time to respond fully to everything that has been said -
but I thought I should insert some actual photos of my system instead of the stock photos in the first post.
Also - Maybe this thread would be better suited in DIY.
If so, Moderators, could you please move it? thank you!
here is my current plan of attack (per toddalin's advise over on AK):
"Add a 1 or 1.5 mfd cap in series with the 2405 and an L-pad on the 175 and also put a 20 ohm, 10 watt resistor in parallel...
Hey guys -
I have been listening to my JBL C-38s for the past few weeks, and have been LOVING them.
They have the 001 load (130a, 175, n1200). They have a midrange that is simply gorgeous and...
Would someone be able to tell via this picture whether these diaphragms are genuine?
These are on a pair of 2403s
Here's my current setup:
D140-R
375 w/Edgarhorns
2403
driven by a JE Labs 2a3 through a Jolida Tube DAC
61589
Switching the polarity on the 375 made a world of difference! Thank you!
This got me wondering:
Is there a way to test each driver to find out which terminal is positive and which terminal is...
I'll give that a shot. thanks!
By this, do you mean reversing the polarity on the 375? on the d140r? on both? thanks!
I have switched to 400hz EdgarHorns. Thank you for the...
Thanks for your reply!
i have attenuated the 375 and 2403 quite a bit. I'll do some more experimenting with that tonight.
Let me clarify: the frequency range I feel that I'm missing is the...
Hey guys-
my current system includes:
32ohm d140r
16ohm 375
16ohm 2403
i had a crossover built by a gentleman in California.
he said the crossover was designed at 800hz/7000hz with 12dB...
I've been chewin' on this 500 vs 800. I think I may have to go to 800.
should've consulted the forum instead just my own thoughts :blink:
I've sent an email to the guy who made the crossovers...
IPAs are my favorite :) The more hops the better for me!
Thank you. I had a gentleman in California design and build them for me. A friend of a friend.
Diabolical IPA by North Peak